Senior 3D Chemical Process Skid Designer – Fabrication Layout, BOM & Equipment Datasheets

**Senior 3D Process Skid / Piping Designer – Oil & Gas / Chemical EPC – CB1000 Fabrication Package** We are seeking a **senior 3D process skid designer / piping designer / mechanical process draftsman** with substantial experience in **oil & gas, chemical processing, gas processing, modular process skids, pressure piping, industrial equipment layout and fabrication-ready EPC documentation**. This is **not an architectural modeling or visualization project**. We need a senior industrial designer who understands how a real chemical/process skid is fabricated, piped, assembled, inspected, transported, installed and maintained. The project is the **CB1000**, an integrated modular carbon-capture and e-methane process system. The attached document: **CB1000 EPC Fabrication Specification – Revision 7** **Document CB1000-EPC-RFQ-0001** will be the primary technical basis for the work. The objective of this engagement is to convert the detailed process, equipment, piping, instrumentation and packaging requirements contained in Rev7 into a **coordinated 3D mechanical/process design package suitable for obtaining firm fabrication quotations from qualified EPC/fabrication companies**. We need the successful freelancer to develop the package far enough that a competent fabricator can understand what must be purchased, fabricated, installed, piped and supported without having to recreate the entire mechanical design from the process specification. --- ## PROJECT OVERVIEW The CB1000 combines multiple process systems including: * carbon dioxide capture; * aqueous MEA absorption and regeneration; * hot CO2-saturated MEA thermal storage; * CO2 conditioning; * CO2 compression; * CO2 liquefaction and controlled revaporization; * water electrolysis; * hydrogen conditioning; * oxygen handling; * three-stage catalytic methanation; * reactor heat recovery; * low-pressure saturated-steam generation; * centralized chilled-water/glycol cooling; * final methane/product-gas conditioning; * product gas analysis; * e-methane export; * instrumentation and automated valves; * fire and gas systems; * controls and electrical interfaces; * and an external CH4/CO2 storage and methane-recovery system designated **SM-1**. The main CB1000 process package must remain inside **one modified 40-ft ISO high-cube module**. Rev7 also defines a separate external SM-1 package consisting generally of: 1. one standard 20-ft high-pressure MGS-1 tube-bank/MEGC module; and 2. one 20-ft process/recovery skid. The external modules are installed end-to-end outside the main CB1000. --- ## PRIMARY OBJECTIVE The primary deliverable is a **fabrication-quotation-ready 3D process/mechanical package**. We want to be able to send the resulting design package to industrial fabricators and obtain reliable quotations for: * purchased equipment; * fabricated equipment; * pressure vessels; * skid/container structural work; * process piping; * high-pressure piping; * valves; * fittings; * supports; * insulation; * instrumentation installation; * equipment mounting; * container modifications; * assembly; * welding; * testing; * FAT; * preservation; * and shipping preparation. The fabricator should not need to guess how the package physically fits together. --- ## REV7 IS THE GOVERNING TECHNICAL BASIS The attached Rev7 specification must be reviewed carefully before detailed modeling begins. Rev7 contains project-specific requirements for: * equipment tags; * equipment duties; * process streams; * operating conditions; * equipment selection; * materials; * pressure and temperature classes; * operating modes; * heating systems; * cooling systems; * valves; * instrumentation; * control functions; * piping; * maintenance access; * packaging; * fabrication; * safety; * testing; * and quotation deliverables. Where Rev7 defines a requirement, it should be followed. Where Rev7 provides the engineering basis but not a final manufacturer/model, the designer should identify a technically suitable standard commercial item or realistic vendor equipment family. Where information is missing, conflicting or impractical, the designer should issue an **RFI / clarification / assumption** rather than silently inventing or changing the design. Any proposed process or equipment change must be identified and approved before implementation. --- ## REQUIRED 3D MODEL The freelancer will develop a coordinated industrial 3D model including, to the level required for fabrication quotation: * main ISO container envelope; * structural base/frame; * equipment skids; * pressure vessels; * tanks; * separators; * pumps; * blowers; * compressors; * heat exchangers; * plate-and-frame exchangers; * shell-and-tube exchangers; * reactors; * steam drum; * steam generator; * electrolyzer modules; * packaged CO2 equipment; * air-cooled chiller equipment; * filters; * process piping; * utility piping; * steam/condensate piping; * chilled-glycol piping; * hydrogen piping; * oxygen piping; * methane/product piping; * high-pressure CO2 piping; * high-pressure CH4/CO2 piping; * process valves; * control valves and actuators; * major instrument connections; * relief piping; * vents; * drains; * pipe racks; * pipe supports; * structural supports; * cable-tray corridors where required for coordination; * MCC/control-panel spaces; * service doors; * removable panels; * equipment-removal zones; * maintenance envelopes; * lifting zones; * insulation envelopes; * battery limits; * and module-break connections. The model does **not** need unnecessary cosmetic rendering detail. The priority is: **correct industrial geometry, fabrication practicality, access, maintainability, reliable material takeoff and clash-free layout.** --- ## MAIN 40-FT CONTAINER REQUIREMENT The main CB1000 must remain inside the modified 40-ft ISO high-cube envelope defined in Rev7. Approximate external envelope: **12.192 m × 2.438 m × 2.896 m** **40 ft × 8 ft × 9 ft 6 in** Approximate usable internal envelope: **12.03 m × 2.35 m × 2.69 m** The designer must treat this as a real packaging constraint. Equipment should not simply be represented as simplified boxes that technically fit. The arrangement must account for: * actual vendor equipment dimensions; * equipment nozzles; * insulation; * valve actuators; * pipe bends; * pipe supports; * access panels; * doors; * instrumentation; * service clearance; * exchanger opening; * motor removal; * compressor service; * reactor catalyst access; * ventilation; * cable trays; * structural steel; * lifting; * and equipment replacement. --- ## SERVICE AISLE AND MAINTENANCE ACCESS Rev7 requires a continuous primary service aisle of approximately **0.80 m / 31.5 in minimum clear width**. The aisle must remain usable after installation of: * piping; * insulation; * valves; * actuators; * instrument stands; * structural supports; * trays; * panels; * and doors. No permanent equipment should obstruct routine maintenance. The final model must demonstrate practical access to maintained components. --- ## BT-1 THERMAL STORAGE VESSEL BT-1 is a major packaging constraint. Rev7 defines BT-1 as an approximately: * 8.0 m3 gross vessel; * 7.0 m3 working volume; * horizontal configuration; * approximately 1.18 m shell inside diameter; * approximately 6.9 m tangent length; * maximum insulated envelope approximately 1.35 m × 7.5 m. BT-1 is intended to run longitudinally along one side of the main container while preserving the primary maintenance aisle. The model must coordinate: * saddles; * insulation; * manways; * nozzles; * level instrumentation; * blanketing/relief connections; * drain; * vent; * thermal-storage piping; * supports; * and inspection access. --- ## REACTOR / STEAM SYSTEM The CB1000 contains three methanation reactor/exchangers: **R-1, R-2 and R-3.** They are three physical, generally identical shell-and-tube catalytic reactors. Catalyst is contained in tubes and a boiling-water/steam circuit removes reaction heat from the shell side. The layout must coordinate: * three vertical reactors; * process-gas connections; * shell-water connections; * common SD-1 steam drum; * downcomers; * two-phase returns; * recovered-steam piping; * reactor insulation; * thermocouple assemblies; * removable reactor heads; * catalyst loading/unloading; * support steel; * and lifting/removal access. Fixed piping must not block reactor-head or catalyst-removal paths. --- ## HEAT EXCHANGERS The CB1000 uses multiple shell-and-tube and plate-and-frame heat exchangers. The designer must maintain real maintenance clearances. For shell-and-tube exchangers, coordinate: * removable heads; * flange access; * bolting access; * tube rodding; * bundle removal where required; * vents; * drains; * removable piping spools; * and lifting. For plate-and-frame exchangers, allow: * plate-pack opening; * follower-plate movement; * plate removal; * gasket replacement; * tightening-bolt access; * and cleaning access. Do not route fixed piping through exchanger maintenance zones. --- ## ROTATING EQUIPMENT Pumps, compressors, blowers and similar equipment must be arranged using industrial maintenance practice. Consider: * motor removal; * cartridge removal; * seal access; * coupling access; * filter/separator access; * drain points; * electrical disconnect access; * vibration monitoring; * piping break points; * and lifting. Do not bury pumps behind piping. Do not put control-valve actuators in motor-removal paths. --- ## AC-1 CENTRAL COOLING SYSTEM Rev7 establishes **AC-1 as the sole installed process-cooling utility**. The selected basis is approximately a **400 kW-th air-cooled chilled-water/glycol system**. The designer must coordinate: * chiller equipment; * evaporator/pump components; * modular condenser/fan sections; * upper/end ventilation bays; * louver locations; * intake air; * discharge air; * fan/coil removal; * chilled-glycol headers; * P-3 circulation package; * branch piping; * insulation; * and service access. The arrangement must avoid hot-air recirculation and provide practical chiller maintenance. No additional local cooling systems should be invented unless specifically approved. --- ## STEAM / THERMAL INTEGRATION The reactor-shell steam circuit is the primary heating system. Recovered reactor heat produces LP steam through R-1/R-2/R-3 and SD-1. Recovered steam is used for MEA heating through STHX-2 and for charging BT-1. SG-1 provides auxiliary startup/trim steam where required. The designer must coordinate: * reactor shell circuits; * SD-1; * steam header; * STHX-2; * SG-1; * condensate; * BT-1 thermal-storage connections; * steam traps; * drains; * vents; * and related control valves. Steam and condensate piping must use normal industrial slope and drainage practices. --- ## CO2 CAPTURE / MEA SYSTEM The capture system contains hot aqueous MEA service. The designer should have experience with chemical-service layout. Coordinate: * vessels; * separators; * pumps; * heat exchangers; * filtration; * solvent piping; * drains; * vents; * level instruments; * sampling; * insulation; * spill/containment interfaces; * and maintenance access. Materials and gaskets must be compatible with the specified service. --- ## C-1 CO2 PACKAGE C-1 is the packaged CO2 compression/liquefaction/controlled-delivery system. The designer should identify a credible commercial package envelope based on the Rev7 duty. The selected envelope should realistically account for: * compressor; * motor; * dryer; * separators; * condenser/aftercooler; * liquid-transfer components; * high-pressure connections; * vaporization/pressure control; * package instrumentation; * maintenance; * and lifting. BT-2 must be coordinated with C-1. BT-2 is a process buffer, not daily bulk storage. --- ## AE-1 ELECTROLYZER AE-1 consists of **three nominal 250 kW modules**, approximately 750 kW total. The 3D model should represent three physical modules and allow for: * front-service access; * rectifier access; * stack/module replacement; * water connections; * chilled-fluid connections; * H2 connections; * O2 connections; * electrical connections; * ventilation; * gas detection; * and lifting. Hydrogen and oxygen services must remain appropriately segregated. --- ## EXTERNAL SM-1 PACKAGE Rev7 defines a separate external CH4/CO2 storage and methane-recovery package. The main components include: * MBC-1 methane booster; * MCP-1 dense CO2 pump; * MRM-1 ratio-metering/mixing panel; * MGS-1 high-pressure tube bank; * AC-901; * MGV-1; * SEP-901; * MPU-1; * P-901; * RC-901; * BR-901; * and PCV-902. MGS-1 is based on a standard nominal 20-ft high-pressure tube-bank/MEGC module with approximately: * 13.032 m3 water volume; * 250 bar working-pressure class; * three isolated storage banks. The process/recovery equipment is installed on a separate nominal 20-ft skid. The external 3D arrangement should define: * equipment positions; * high-pressure piping; * valve access; * supports; * utility interfaces; * service clearances; * removable panels; * module breaks; * instrumentation; * fire/gas interfaces; * and connection back to the main CB1000. --- ## EQUIPMENT DATASHEETS A major part of the work is preparation and coordination of equipment datasheets. Rev7 identifies approximately **46 approved equipment datasheets** in the EPC deliverable basis. Datasheets should include, where applicable: * equipment tag; * quantity; * service; * process purpose; * normal capacity; * design capacity; * flow; * pressure; * design pressure; * temperature; * design temperature; * heat duty; * volume; * materials; * motor rating; * electrical requirements; * nozzles; * insulation; * instrumentation; * controls; * hazardous-service requirements; * maintenance clearance; * dimensions; * weight; * applicable code; * testing requirements; * certificates; * accessories; * and vendor documentation. Datasheets and 3D geometry must agree. --- ## COMMERCIAL EQUIPMENT SELECTION Rev7 favors commercially available standard equipment where practical. The designer should identify realistic equipment/vendor families for major purchased components. For each selected commercial item, provide where available: * manufacturer; * model/family; * design capacity; * pressure rating; * temperature rating; * dimensions; * weight; * electrical load; * service limitations; * maintenance envelope; * and technical literature. If a commercial model cannot yet be identified, create a clearly marked **preliminary engineering envelope**. Do not present assumed dimensions as confirmed vendor dimensions. Use status such as: * Confirmed Vendor Data; * Catalog Data; * Preliminary Vendor Data; * Engineering Assumption; * TBD. --- ## EQUIPMENT REGISTER Maintain a master equipment register including: * tag; * quantity; * service; * equipment type; * datasheet number; * manufacturer; * model; * dimensions; * dry weight; * operating weight; * motor/load; * material; * design pressure; * design temperature; * 3D-model status; * BOM number; * vendor-data status; * and open technical items. --- ## P&ID / TAG COORDINATION Rev7 includes the principal CB1000 P&ID and supplementary placement information. The designer must coordinate all: * printed equipment tags; * supplementary internal equipment; * external SM-1 equipment; * process streams; * supplementary steam/TES streams; * valves; * check valves; * sensors; * functional instruments; * control-loop tags; * and battery-limit paths. Do not omit equipment merely because it is schedule-only rather than graphically printed on the primary P&ID. Do not arbitrarily renumber tags. --- ## IMPORTANT DWSIM / PHYSICAL EQUIPMENT RULE Rev7 includes process-model calculation fragments. Letter-suffixed calculation elements are not automatically separate physical equipment. The physical fabrication/procurement basis is generally the unsuffixed equipment and stream tag. The designer must understand the difference between simulation elements and manufactured equipment. Experience converting **DWSIM, Aspen, HYSYS or similar simulation models into physical equipment/piping layouts** is highly relevant. --- ## PIPING DESIGN The piping scope is significant. The designer must be comfortable laying out: * exhaust; * MEA; * captured CO2; * liquid/dense CO2; * hydrogen; * oxygen; * methanation gas; * methane product; * recovered steam; * condensate; * chilled glycol; * process water; * high-pressure methane; * high-pressure CO2; * high-pressure CO2/CH4 mixtures; * recovered methane; * vents; * drains; * samples; * and relief systems. Routing must consider: * process sequence; * pressure drop; * drainage; * high points; * low points; * thermal expansion; * maintenance access; * valve access; * insulation; * support; * vibration; * nozzle loads; * compressor/pump connections; * oxygen cleanliness; * hydrogen leak tightness; * thermal relief; * depressurization; * and fabrication spool logic. --- ## PIPING MATERIALS / CLASSES Rev7 defines service-specific piping materials and pressure classes. The selected designer should maintain a pipe-class register covering: * service; * nominal size; * pipe material; * schedule/wall; * joint type; * flange class; * design pressure; * design temperature; * gasket; * valve basis; * insulation; * cleaning; * testing; * labeling; * and special requirements. Process piping includes significant stainless-steel service. High-pressure systems require appropriate rated pipe/tubing and connections. Oxygen service requires oxygen-clean construction. Hydrogen service requires suitable leak-tight materials and seals. Hot MEA service requires compatible materials/gaskets. --- ## PIPING ISOMETRICS Rev7 organizes quotation piping into six principal systems: * CB1000-ISO-101; * CB1000-ISO-201; * CB1000-ISO-301; * CB1000-ISO-401; * CB1000-ISO-501; * CB1000-ISO-601. These cover the main capture/MEA, CO2, electrolysis, methanation/steam, chilled-glycol and external SM-1 systems. The freelancer should produce coordinated quotation/fabrication-oriented isometric drawings or equivalent detailed piping drawings. Please state in your proposal how your preferred CAD software generates isometrics. --- ## PIPING BOM / MTO A coordinated piping BOM/MTO is a major deliverable. Rev7 currently provides a baseline total internal-plus-external takeoff of approximately: * **816 m / 2,677 ft of pipe/tube**; * **519 elbows**; * **196 tees/reducers**; * **638 flange/high-pressure/grooved joints**; * **290 manual valves**; * **104 pneumatic valves**; * **58 check valves**; * **446 supports**. These quantities must be reconciled against the final developed 3D design. The designer should provide: **Rev7 baseline → 3D model quantity → difference → reason** We do not want someone simply copying Rev7 quantities into Excel. The model should validate the fabrication takeoff. --- ## PIPE SUPPORTS Develop sufficient pipe-support design for fabrication quotation. Include concepts/quantities for: * shoes; * guides; * anchors; * clamps; * hangers; * rack supports; * stanchions; * brackets; * tubing supports; * valve supports; * actuator supports; * and equipment-adjacent supports. Support selection must consider: * piping weight; * operating fluid; * insulation; * thermal movement; * vibration; * high pressure; * and maintenance. --- ## PIPING STRESS AWARENESS Formal stress analysis may be a separate specialist task, but the senior piping designer must understand stress-sensitive routing. Particular attention should be given to: * compressors; * pumps; * reactors; * heat exchangers; * hot steam; * hot MEA; * high-pressure gas; * and external module connections. If formal CAESAR II or equivalent analysis is recommended, identify the applicable lines. If you can provide piping stress analysis, identify it separately in your proposal. --- ## VALVE LAYOUT Automatic and manual valves must be physically accessible. Ensure: * handwheels can be reached; * actuators do not block the aisle; * control valves can be removed; * isolation valves are usable; * trapped-pressure bleed/drain arrangements are accessible; * heavy actuators are supported; * high-pressure valves are supported; * and maintenance spools are provided where appropriate. Automatic valves should include realistic actuator envelopes for clash detection. --- ## RELIEF / VENT / DRAIN SYSTEMS Coordinate safe routing for: * H2/CH4/off-spec gas; * oxygen; * CO2/inert gas; * pressure relief; * steam relief; * chemical/process drains; * condensate; * and sample drains. Relief paths must remain unblocked. Dense/liquid CO2 trapped between isolation valves must be considered for thermal expansion protection. Safe-discharge routes should terminate outside occupied process spaces. --- ## BATTERY LIMITS Clearly identify external interfaces including, as applicable: * exhaust; * product gas; * captured CO2; * water; * instrument air; * nitrogen; * power; * communications; * drains; * safe vents; * SM-1 methane; * SM-1 CO2 carrier/makeup; * chilled glycol; * steam/condensate; * ESD; * fire/gas; * and recovered methane/fuel gas. Battery-limit locations should be obvious to the fabricator and installer. --- ## STRUCTURAL / CONTAINER DESIGN COORDINATION Develop sufficient structural information for fabrication quotation. Coordinate: * ISO container; * bottom rails; * reinforced crossmembers; * equipment skid rails; * vessel supports; * reactor supports; * chiller supports; * pipe racks; * equipment bases; * removable panels; * service doors; * roof hatches; * partitions; * floor modifications; * lifting features; * and major structural reinforcement. Equipment loads should transfer into credible structural load paths. Do not rely on thin container roof or wall panels as primary structural supports. Formal stamped structural engineering may be completed separately unless specifically included in the freelancer's proposal. --- ## WEIGHT MANAGEMENT Rev7 provides approximate package mass bases including: * approximately 21,000 kg dry installed; * approximately 24,000 kg shipping; * approximately 30,000 kg normal wet operating. Maintain a preliminary weight register covering significant: * equipment; * steel; * piping; * valves; * supports; * insulation; * panels; * trays; * and permanent accessories. Flag potential weight problems early. The arrangement should also consider center of gravity and transport/lifting. --- ## ACCESS / REMOVAL STUDY Rev7 requires a 3D coordinated access study. The final model should demonstrate that major maintenance operations are possible. We expect review of items such as: * BT-1 access; * reactor-head removal; * catalyst loading/unloading; * SD-1 access; * shell-and-tube exchanger opening; * PFHX plate-pack opening; * pump/motor removal; * compressor maintenance; * filter replacement; * valve/actuator removal; * analyzer access; * chiller coil/fan maintenance; * electrolyzer module service; * external SM-1 equipment maintenance; * and continuity of the main aisle. --- ## INSTRUMENT COORDINATION The 3D model should include sufficient instrumentation detail for realistic layout and quotation. Coordinate where applicable: * pressure taps; * temperature wells; * level chambers; * flow meters; * analyzer sample points; * sample panels; * instrument valves; * instrument stands; * calibration access; * gas detectors; * and local junction boxes. Flow-meter installation lengths and maintenance clearance must be considered. --- ## HAZARDOUS-SERVICE LAYOUT The CB1000 includes hydrogen, methane, oxygen, CO2, hot MEA and steam. The successful freelancer must understand basic hazardous-process-layout principles. The model should support later formal safety engineering by providing: * good ventilation paths; * minimized combustible-gas pockets; * oxygen-system segregation; * appropriate equipment access; * safe vent routing; * emergency access; * gas-detector access; * and separation between process and electrical/control spaces. Formal HAZOP/LOPA/SRS work is not automatically included in this drafting scope, but obvious unsafe layout practices will not be acceptable. --- ## ELECTRICAL / CONTROL SPACE Rev7 supports both: * 400 V / 50 Hz EU/CE; * 480Y/277 V / 60 Hz USA/Canada. The mechanical core should remain as common as practical. Reserve credible space for: * MCC; * VFDs; * PLC/control panels; * SIS/safety equipment; * UPS; * network equipment; * analyzer panels; * local junction boxes; * and cable trays. Mechanical piping must not obstruct electrical service clearances. --- ## INSULATION Insulation must be included during clash review. Account for actual finished diameters of: * hot process piping; * steam; * hot MEA; * chilled-glycol piping; * cold equipment; * vessels; * exchangers; * valves; * and removable blankets. A pipe that clears before insulation but clashes after insulation is a clash. --- ## EXPECTED DRAWINGS Expected drawings include, as appropriate: ### General Arrangement * main-container plan; * elevations; * equipment tags; * major dimensions; * maintenance aisle; * equipment footprints; * maintenance envelopes; * battery limits; * access panels; * and external SM-1 arrangement. ### Equipment Layout * equipment coordinates; * elevations; * orientations; * support points; * maintenance zones; * and preliminary nozzle directions. ### Piping Layout * process piping; * utilities; * elevations; * valves; * supports; * module breaks; * vents; * drains; * and battery limits. ### Piping Isometrics Quotation/fabrication-oriented isometrics covering the required process systems. ### Structural Layout * base steel; * equipment supports; * racks; * major reinforcement; * panel framing; * and skid frames. ### Access / Maintenance Drawings Views demonstrating major equipment-maintenance paths. --- ## EQUIPMENT BOM Prepare a complete equipment BOM including: * BOM number; * equipment tag; * quantity; * description; * service; * manufacturer; * model; * capacity; * dimensions; * dry weight; * operating weight; * materials; * motor; * electrical variant; * package accessories; * datasheet reference; * vendor-data status; * and quotation status. Vendor package boundaries must be clearly identified to avoid double counting. --- ## PIPING BOM Prepare a fabrication-oriented piping MTO covering: * pipe; * tubing; * elbows; * tees; * reducers; * branches; * flanges; * high-pressure fittings; * gaskets; * bolting; * valves; * check valves; * traps; * drains; * vents; * sample fittings; * supports; * insulation; * labels; * and module-break hardware. --- ## STRUCTURAL / CONTAINER BOM Prepare quotation-level quantities for: * modified container; * reinforcement; * base steel; * crossmembers; * skid rails; * equipment bases; * vessel saddles; * reactor supports; * pipe racks; * partitions; * removable panels; * service doors; * hatches; * flooring; * supports; * platforms/steps where required; * lifting features; * louvers; * and coatings. --- ## MODEL / DATASHEET / BOM CONSISTENCY This is critical. The: * Rev7 equipment requirement; * selected vendor/model; * equipment datasheet; * 3D equipment envelope; * GA; * piping model; * equipment BOM; * and MTO must remain coordinated. We will not accept a model where one equipment size appears in the datasheet and another appears in the 3D layout. --- ## SUGGESTED WORKFLOW ### Phase 1 – Rev7 Review Prepare: * design-basis summary; * equipment register; * drawing/document register; * RFI log; * assumption register; * and compliance review. ### Phase 2 – Equipment Envelopes Identify realistic equipment dimensions, weights, maintenance areas and vendor information. ### Phase 3 – Preliminary Layout Establish: * container; * BT-1; * capture area; * C-1/BT-2; * AE-1; * reactors; * SD-1; * SG-1; * AC-1; * panels; * main aisle; * and battery limits. ### Phase 4 – 60% Design Develop major piping, racks, access, structural concepts and utility routing. ### Phase 5 – Detailed 3D Routing Complete process piping, utilities, valves, supports, vents, drains, relief routing and module breaks. ### Phase 6 – Equipment Datasheets Finalize commercial selections and equipment data. ### Phase 7 – BOM / MTO Generate and reconcile quantities. ### Phase 8 – Quotation Drawings Produce GA, layouts, isometrics and supporting schedules. ### Phase 9 – Final Coordination Perform: * clash review; * access review; * tag review; * weight review; * BOM reconciliation; * and Rev7 compliance review. --- ## CLASH DETECTION Final coordination should check: * pipe-to-pipe; * pipe-to-equipment; * pipe-to-structure; * valve-actuator clashes; * insulation clashes; * panel-door clearance; * main-aisle obstruction; * equipment-removal paths; * exchanger access; * reactor access; * pump removal; * compressor service; * instrument access; * and container-envelope violations. Engineering judgment is required. We are interested in meaningful fabrication and maintenance clashes, not simply an automated software list. --- ## REQUIRED EXPERIENCE We are seeking a genuinely senior designer. Ideal candidates will have approximately **8–15+ years of relevant industrial experience** in roles such as: * Senior Piping Designer; * Senior Mechanical Designer; * Process Skid Designer; * Plant 3D Designer; * Package Equipment Designer; * Lead Piping Designer; * Skid Engineer; * Mechanical/Piping Draftsman; * Modularization Designer; * Process Mechanical Engineer with strong CAD capability; * or similar. Relevant project experience includes: * oil & gas process skids; * gas compression; * natural-gas processing; * carbon capture; * amine systems; * hydrogen systems; * CO2 systems; * methane/RNG systems; * fuel-gas skids; * refinery packages; * CNG/LNG systems; * electrolyzer balance of plant; * pressure-reduction/metering skids; * membrane/PSA packages; * steam systems; * modular chemical plants; * containerized process packages; * and high-pressure gas storage systems. --- ## FABRICATION EXPERIENCE IS IMPORTANT The ideal freelancer has worked directly with fabrication shops and understands: * welding; * spool design; * flange access; * NDE; * hydrotesting; * pneumatic/leak testing; * oxygen cleaning; * passivation; * skid assembly; * pipe supports; * shipping restraints; * module breaks; * FAT; * and field installation. If you have personally supported a skid from 3D design through fabrication and FAT, please describe it. --- ## CAD SOFTWARE We are open to professional industrial CAD platforms including: * AutoCAD Plant 3D; * CADWorx; * AVEVA E3D/PDMS; * Bentley OpenPlant; * SolidWorks; * Autodesk Inventor; * AutoCAD; * or another suitable plant/mechanical system. Please state: 1. which system you recommend; 2. why; 3. how piping specifications are managed; 4. how isometrics are generated; 5. how BOM/MTO quantities are generated; 6. what native editable files you will deliver; 7. what neutral 3D formats you can provide. We prefer a data-structured plant-design workflow rather than a collection of unrelated generic CAD solids. --- ## FINAL FILES Expected final files include: * native editable CAD/3D model; * PDF drawing package; * DWG/DXF where applicable; * neutral 3D exchange format; * equipment register; * equipment datasheets; * pipe-class register; * equipment BOM; * piping BOM/MTO; * structural BOM; * valve schedule; * support schedule; * weight register; * vendor-data folder; * RFI/assumption register; * and revision register. All project-specific source files must be delivered at completion. --- ## REVISION CONTROL Use professional engineering document control. Drawings and schedules should include: * document number; * title; * revision; * date; * status; * and revision description. Do not use uncontrolled filenames such as "final2" or "final-latest." --- ## COMMUNICATION We expect regular progress communication. During active design, provide organized updates showing: * current 3D views; * completed systems; * open RFIs; * vendor-data requirements; * major technical issues; * decisions required; * and upcoming work. Major layout decisions should be reviewed before detailed piping is completed. --- ## WHAT WE DO NOT WANT Please do not apply if your experience is primarily: * architectural drafting; * residential CAD; * interior design; * rendering; * animation; * generic BIM; * basic PDF-to-DWG conversion; * or product visualization. This is an industrial process-equipment and piping assignment. --- ## WHAT WILL MAKE YOUR PROPOSAL STAND OUT Please include examples of industrial process work you personally designed. Useful examples include: * 3D process skid; * process-module layout; * piping GA; * piping isometric; * equipment-layout drawing; * pipe-support design; * equipment datasheet; * BOM/MTO; * fabricated skid photograph; * or maintenance-access study. Client names and confidential information may be redacted. --- ## QUESTIONS TO ANSWER IN YOUR PROPOSAL Please answer these directly: 1. How many years have you worked specifically on industrial piping/process skid design? 2. What types of oil/gas, chemical, CO2, hydrogen, amine, methane or gas-processing packages have you designed? 3. Which CAD system would you recommend for CB1000 and why? 4. Can you create the complete 3D layout and piping isometrics? 5. Can your workflow generate or support accurate BOM/MTO quantities? 6. Have you designed equipment inside ISO containers or similarly dense modular skids? 7. Have your designs actually been fabricated? 8. Have you supported fabrication, FAT or field installation? 9. Can you select commercial equipment from process requirements and vendor literature? 10. Can you prepare equipment datasheets? 11. What is your experience with ASME B31.3 or equivalent process piping? 12. What experience do you have with high-pressure gas, hydrogen or CO2 systems? 13. Can you perform maintenance/access reviews? 14. Can you prepare pipe-support layouts? 15. Can you perform piping stress analysis? If yes, identify the software. 16. Will you personally perform the work? 17. If you have a team, who will perform modeling, piping, datasheets and checking? 18. What native and neutral CAD formats will you deliver? 19. How many hours per week are you available? 20. When can you start? 21. What additional information would you require after reviewing Rev7? 22. What would you deliver during the first two weeks? 23. How would you divide the project into milestones? 24. How do you manage engineering revisions and tag consistency? 25. What do you believe are the biggest physical-layout risks in the CB1000 concept? --- ## PROPOSAL FILTER Please begin your proposal with: **CB1000 REV7** Immediately after this, describe the **most similar industrial process skid or modular plant that you personally designed**. Generic proposals that do not reference the actual project scope will not receive priority. --- ## PROPOSED MILESTONES We expect a milestone-based engagement. A possible structure is: ### Milestone 1 – Rev7 Review / Design Basis * equipment register; * document register; * RFI register; * assumptions; * preliminary CAD execution plan. ### Milestone 2 – Equipment Selection / Preliminary Layout * major commercial equipment envelopes; * initial datasheets; * container model; * preliminary equipment layout; * service aisle and access review. ### Milestone 3 – 60% 3D Layout * major equipment complete; * major piping; * utility routing; * structural concepts; * maintenance zones; * battery limits. ### Milestone 4 – Detailed Piping / Datasheets * detailed piping; * valves; * supports; * equipment datasheets; * pipe classes; * preliminary isometrics; * preliminary MTO. ### Milestone 5 – Fabrication Quotation Package * final coordinated model; * GA; * layouts; * isometrics; * equipment BOM; * piping BOM; * structural BOM; * access study; * weight register; * Rev7 quantity reconciliation. ### Milestone 6 – Final Review / Issue Incorporate agreed comments and deliver final editable model, drawings and schedules. Candidates may suggest a better milestone structure based on their experience. --- ## DEFINITION OF SUCCESS This assignment will be considered successful when a competent industrial fabricator can receive: * CB1000 Rev7; * the coordinated 3D model; * equipment datasheets; * equipment/vendor schedule; * GA/layout drawings; * piping/isometrics; * equipment BOM; * piping BOM/MTO; * structural/container BOM; * and supporting registers, and use them to develop a serious fabrication quotation without first having to redesign the complete mechanical package. The final design should demonstrate that the process equipment can be installed within the required package envelope while preserving: * process functionality; * maintenance; * equipment removal; * piping integrity; * safety; * fabrication practicality; * and service access. This is a technically demanding modular-process design assignment. We are therefore looking for a **senior industrial process skid / piping designer**, not a general CAD operator. If you have the required background, review the attached **CB1000 EPC Fabrication Specification Rev7**, begin your proposal with **CB1000 REV7**, show us your most relevant process-skid work, identify your recommended CAD platform and explain how you would take this project from Rev7 through a fabrication-quotation-ready 3D package.